neeeeeeeed help with science

Answer:

2. They are hollow.

Explanation:

goo  gle says

Answer:

Answer:

its nuber 3

wdPDAPS

Explanation:

Answer:

Some early research suggests that subliminal messages may influence food- and diet-related thoughts and behaviors. However, other research has found that subliminal messages with weight loss cues have no effect.

Explanation:

Answer:

1.4 L.

Explanation:

Applying Charles law,

V/T = V'/T'....................... Equation 1

Where V = Initial volume, V' = Final volume, T = Initial Temperature in Kelvin, T' = Final Temperature in Kelvin.

Make V' the subject of the equation

V' = (V/T)T'..................... Euqation 2

Given: V = 1.5 L, T = 295 K, T' = 2 °C = (2+273) K = 275 K

Substitute these values into equation 2

V' = (1.5/295)275

V' = 1.398

V' ≈ 1.4 L

In the balanced equation, the mass of reactant is exactly equal to the mass of product. The respective coefficients needed to balance the equation is N₂(g) + 3H₂(g) ⇒ NH₃(g) .

A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.

Because mass cannot be generated or destroyed, according to the rule of conservation of mass, a chemical equation must always be in balance.

The Law of Conservation of Mass is followed by a balanced equation. This is a crucial scientific guiding principle. Finally, a balanced equation enables us to forecast the quantity of reactants and products that will be produced. Sort of crucial if you're attempting to determine how much fuel to supply a spacecraft traveling to Mars

Thus, the balanced equation is N₂(g) + 3H₂(g) ⇒ NH₃(g) .

To learn more about balanced equation, follow the link;

https://brainly.com/question/7181548

#SPJ2

Answer:

The correct answer to that question is glaciers, waves, wind.

Answer:

I think it is D but I could be wrong.

Explanation:

Explanation: B.

Bees pollinate in order to sweeten their seed

Answer:

A

Explanation:

Bees make excellent pollinators because most of their lives is spent collecting pollen which acts as a protein to feed their offspring

Answer:

27 g

Explanation:

From the question,

n = Mv...................... Equation 1

Where n = number of mole of Al₂SO₄,  M = Molarity of Al₂SO₄, v = Volume of the solution.

Given: M = 0.12 mol/L, v = 1.5 L.

Substitute these values into equation 1

n = 0.12×1.5

n = 0.18 mol

Also,

n = Mass(m)/Molar mass (m')

n = m/m'.

m = n×m'......................... Equation 2

Given: The molar mass of Al₂SO₄ = (27×2)+32+(16×4) = 150 g/mol

Substitute into equation 2

m = 0.18×150

m = 27 g

Answer:

0.67moles

Explanation:

The balanced equation of the chemical reaction given in this question is:

N2 + 3H2 → 2NH3

According to this equation, 3 moles of hydrogen gas (H2) produces 2 moles of ammonia gas (NH3)

Therefore, 1 mole of hydrogen gas (H2) will produce;

= 1 × 2/3

= 2/3

= 0.6666

= 0.67moles of ammonia (NH3)

Answer:

yes

Explanation:

solubility rules allow prediction of what products will be insoluble in water.

Answer:

replication

:D

Answer:

121.14 g H20

Explanation:

2 (atomic weight of H2) + 16 (atomic weight of oxygen)= 18

6.73 x 18= 121.14 g

Answer:

2:3

You'd need 33.3 moles of potassium chlorate, KClO3 , to produce that much oxygen. Notice that you have a 2:3. mole ratio between potassium chlorate and oxygen gas, which means that, regardless of how many moles of the former react, you'll always produce 3/2 times more moles of the latter.

Explanation:

Answer:

yes it is 18.7

Answer:

1 Mole

here is answer

hope it will help you

Answer:

A. 1350

You multiply 18.21HNO3* 1mol MgN2O6 * 148.30MgN2O6

Then divide it by the 2mol HNO3 to get 1350

Answer:

Kinetic energy!

Explanation:

It measures the average kinetic energy of the molecules of a substance in degrees Fahrenheit (F) or Celsius (C).

Have a good day!!

Answer:

The molarity of the solution is 0.016 [tex]\frac{moles}{L}[/tex]

Explanation:

Molar concentration is a measure of the concentration of a solute in a solution.

Molarity (M) or Molar Concentration is the number of moles of solute that are dissolved in a certain volume.

Molarity is determined by dividing the moles of the solute by the volume of the solution:

[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

Being 169.87 g / mole the molar mass of AgNO₃, then you can apply the following rule of three: if 169.87 grams are contained in 1 mole, 6.87 grams are contained in how many moles?

[tex]amount of moles=\frac{6.87 grams*1 mole}{169.87 grams}[/tex]

amount of moles= 0.04 moles

Then:

Replacing:

[tex]Molarity=\frac{0.04 moles}{2.50 L}[/tex]

Solving:

Molarity= 0.016 [tex]\frac{moles}{L}[/tex]

The molarity of the solution is 0.016 [tex]\frac{moles}{L}[/tex]

According to Kinetic Molecular Theory, an increase in temperature will increase the average kinetic energy of the molecules. As the particles move faster, they will likely hit the edge of the container more often. If the reaction is kept at constant pressure, they must stay farther apart, and an increase in volume will compensate for the increase in particle collision with the surface of the container.

hope this helps!

could i get brainiest?

Answer:

F=ma where F = force in N, m = mass in g and a = acceleration in [tex]m/s^{2}[/tex]

Answer:

b) posee la forma del recipiente que lo contiene y ocupa un volumen constante

Explanation:

Hay tres estados de la materia;

Sólido

Líquido

Gas

En estado líquido, la materia no tiene forma ni volumen definidos. Esto implica que la materia adquiere la forma del recipiente en el que se encuentra.

El líquido tiene un volumen definido. No ocupa el volumen del envase.

More about this source textSource text required for additional translation information

Answer:

yes

Explanation:

Revolution is the movement of an object around another object. So, Earth revolves around the Sun, and the Moon revolves around Earth. At the same time, Earth and the Moon are also rotating. Earth's rate of revolution is about 365 days (one year), and its rate of rotation is about 24 hours (one day).

answer

Avogadro's law states that, at constant temperature and pressure, the volume of a gas is directly proportional to the number of moles present. In other words, equal volumes of gases at the same pressure and temperature contain the same number of molecules - this is true regardless of their physical properties or chemical nature.

This number of molecules is

6.022

⋅

10

23

and is known as Avogadro's number,

N

A

.

Matematically, Avogadro's law can be written like this

V

n

=

c

o

n

s

t

, or, better yet,

V

1

n

1

=

V

2

n

2

.

Avogadro's law, as well as Boyle's law and Charles' law, are special cases of the ideal gas law,

P

V

=

n

R

T

. If temperature and pressure are kept constant, and knowing that

R

is of course constant, then

P

V

=

n

R

T

→

P

V

n

=

R

T

→

V

n

=

R

T

P

=

c

o

n

s

t

, which represents Avogadro's law.

The ideal gas law can also be written to incorporate

N

A

, since the number of moles are actually the number of molecules divided by Avogadro's number

P

V

=

N

N

A

⋅

R

T

, where

N

represents the number of molecules.

Answer:

SeCl₆ + O₂ → SeO₂ + 3Cl₂

Explanation:

Unbalanced:

SeCl₆ + O₂ → SeO₂ + Cl₂

Count the atoms.

On the left side, we have 1 Se atom, 6 Cl atoms, and 2 O atoms.

On the right side, we have 1 Se atom, 2 O atoms, and 2 Cl atoms.

So everything is balanced except for Cl. To balance, we put a 3 coefficient in front of Cl₂.

SeCl₆ + O₂ → SeO₂ + 3Cl₂

c: